What is Liang-Barsky line clipping?
What is Liang-Barsky line clipping?
Barsky) is a line clipping algorithm. The Liang–Barsky algorithm uses the parametric equation of a line and inequalities describing the range of the clipping window to determine the intersections between the line and the clip window. With these intersections it knows which portion of the line should be drawn.
When U 0 in Liang-Barsky algorithm then the line is?
When pk = 0 and qk < 0 then line is trivially invisible because it is outside view window. When pk = 0 and qk > 0 then the line is inside the corresponding window boundary….Liang-Barsky Algorithm.
| Condition | Position of line |
|---|---|
| pk < 0 | line proceeds from outside to inside |
| pk > 0 | line proceeds from inside to outside |
What is clipping explain Cohen Sutherland line clipping algorithm give an example?
The Cohen–Sutherland algorithm is a computer-graphics algorithm used for line clipping. The algorithm divides a two-dimensional space into 9 regions and then efficiently determines the lines and portions of lines that are visible in the central region of interest (the viewport).
What is generalized clipping?
In a generalized clipping operation, both the objects being drawn and the clipping region are represented as generalized polygons with a non-zero winding number. An object may be entered and clipped by simply tracing its boundary and the clipping region boundary.
Which of the following is efficient line clipping algorithm?
Sutherland-Cohn algorithm is the most widely used line clipping algorithm. The major time consumed in this method comes from the line-window intersect calculations and the area code generations; both of them require floating point operations.
How do you do a line clipping?
Algorithm
- Step 1 − Assign a region code for each endpoints.
- Step 2 − If both endpoints have a region code 0000 then accept this line.
- Step 3 − Else, perform the logical ANDoperation for both region codes.
- Step 3.1 − If the result is not 0000, then reject the line.
- Step 3.2 − Else you need clipping.
- Step 3.2.
- Step 3.2.
What are the types of clipping?
Types of Clipping:
- Point Clipping.
- Line Clipping.
- Area Clipping (Polygon)
- Curve Clipping.
- Text Clipping.
- Exterior Clipping.
What’s the difference between Liang Barsky and line clipping?
The only difference is Liang-Barsky algorithm has been optimized for an upright rectangular clip window. So we will study only the idea of Liang-Barsky. Liang and Barsky have created an algorithm that uses floating-point arithmetic but finds the appropriate end points with at most four computations.
Is the Liang Barsky clipping algorithm the same as Cyrus Beck?
The ideas for clipping line of Liang-Barsky and Cyrus-Beck are the same. The only difference is Liang-Barsky algorithm has been optimized for an upright rectangular clip window. So we will study only the idea of Liang-Barsky.
Which is more efficient Liang or Sutherland line clipping algorithm?
Liang-Barsky Algorithm. The Liang-Barsky algorithm is a line clipping algorithm. This algorithm is more efficient than Cohen–Sutherland line clipping algorithm and can be extended to 3-Dimensional clipping. This algorithm is considered to be the faster parametric line-clipping algorithm.
How is the Liang Barsky algorithm more efficient?
The Liang–Barsky algorithm uses the parametric equation of a line and inequalities describing the range of the clipping window to determine the intersections between the line and the clip window. With these intersections it knows which portion of the line should be drawn. This algorithm is significantly more efficient than Cohen–Sutherland.